docs: def update_resources_from_datafile(self, srcpath, type_, names=None, 
                                         languages=None):
          """
          Update or add resource data from file srcpath.
          
          type_ = resource type to update
          names = a list of resource names to update (None = all)
          languages = a list of resource languages to update (None = all)
          
          """
          UpdateResourcesFromDataFile(self.filename, srcpath, type_, names, 
                                      languages)